...Add other UIViews to your cell, connect the outlet from this view to the cell property containerView. Add constraints from this view to the superview. Add constants, add property for calculate cells height, override method, add code to method, control if the cell is open or closed, and add code to your new cell class. This library is a part of a selection of our best UI open-source projects. We specialize in the designing and coding of custom UI for Mobile Apps and Websites.